[Bug target/102974] GCC optimization is very poor for add carry and multiplication combos

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102974

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to cqwrteur from comment #4)
> (In reply to cqwrteur from comment #3)
> > (In reply to Andrew Pinski from comment #2)
> > > There might be another bug about _addcarryx_u64 already.
> > 
> > This is 32 bit addcarry.
> 
> but yeah. GCC does not perform optimizations very well to add carries and
> mul + recognize >>64u <<64u patterns

I mean all of _addcarryx_* intrinsics.